Amar Singh has been close to Dutt and was his mentor when the actor briefly dabbled in politics.

Earlier, several celebrities including Press Council of India Chairman Markandey Katju and actor-turned-politicians Jaya Bachchan and Shatrughan Sinha had sought pardon for Dutt.

"He (Dutt) has already been punished enough. Twenty years is almost like life imprisonment. I am going to personally meet the Governor," Bachchan had told reporters outside Parliament House recently.

Sinha had joined Katju in appealing to the Maharashtra Governor to pardon Dutt after the Supreme Court upheld his conviction in the 1993 Mumbai blasts case.

In a statement on Thursday, Katju had sought pardon for Dutt under Article 161 of the Constitution saying that he had not been found guilty of having played a role in the 1993 blasts and had suffered a lot.